Machinist&#39;s gauge



April 2, 1946. G. KONING .MACHINISTS GAUGE- Filed NOV. 22, 1944 PatentedApr. 2, 1946 UNITED STATES PATENT OFFICE MACHINISTS GAUGE Gerald Koning,Muskegon, Mich. Application November 22, 1944, Serial No. 564,625

2 Claims.

This invention appertains to improvements in gauges for the use ofmachinists in shop practice, and it has for one of its several objectsto provide a type thereof for the precision measurement of heights onplaners, shapers, and like machines, and for similar purposes; the gaugebeing a combination of spirit level mounted in an opening in aright-angle triangular block or frame and a slidable gauge head that isadapted to be adjustably clamped in set position on the slottedhypothenuse surface of the block or frame.

Another object of the invention has to do with the provision of a gaugeof this kind, which embodies certain refinements in its features ofadjustment, the same being designed to allow the gauge head to be setquickly at a roughly approximated position and thereafter adjusted withprecision to a final setting and secured against accidental displacementfrom such final setting; the general functions of this type of gauge arefully set forth in the U. S. Patent No. 1,202,114, to Leroy S. Starrett,and are therefore well understood through the use of various modifiedforms in the trade.

With these and other objects and advantages in view, the inventionresides in the certain new and useful combination, construction, andarrangement of parts, as will be hereinafter more fully described, setforth in the appended claims, and illustrated in the accompanyingdrawing, in which:

Figure 1 is a side elevation of the improved gauge, in accordance withthe invention; a portion of the upper inclined side of the block orframe being broken away to show the slotted hypothenuse surface thereofand the clamp means for securing the sliding head in a position ofadjustment thereon;

Figure 2 is a vertical transverse section, taken through the line 22 onFigure 1; and

Figure 3 is a fragmentary sectional view, taken on the line 3-3 ofFigure 1, looking in the direction of the arrows,

Referring to the drawing in detail, the improved gauge, as it isexemplified therein, is comprised in a triangular frame having a centralweb l2 with an opening 14 in which a spirit level I6 is positioned toindicate the true horizontal position of the lower side I'll, or thetrue vertical position of the side ID", of the frame Ill. The inclinedside [0a is formed to provide a T- slot [8 in which a clamp plate 20 isguided. The face of the inclined side Illa is longitudinally eled, as at22, with the opposite sides of the channel diverging upwardly from aslot 24 opening into the upper side of the T-slot l8.

Positioned on the inclined side 10a, of the frame It, is a slidablegauge head 26 which has its base surface shaped to, conform' to that ofthe channel 22 for its stable support therein. The gauge head 26 has anopening through the same, as at 28, and an opening 30 through its lowerside for the passage through the latter of a clamp screw 32 that has itslower end engaged with the slide plate 20. The screw 32 passes upwardlyfrom the opening 36 through a second clamp plate 38 and into the opening28, where it is provided with a knurled head 34 and a knurled lock nut36. The slide plate 38 rests upon the lower inclined side of the opening28 and is provided with an upturned end 40, which is engaged in anannular groove 44 formed in a knurled adjusting nut 42 engaged on aheadless bolt 46 that is screw threaded into the near end wall of theopening 28. A shoulder 48 is offset from the lower end of the longervertical side of the gauge head 26 and is, together with the tophorizontal side of the latter, provided with screw threaded openings 50and 52, respectively; a like opening 54 being also formed in longervertical side, at a point above the position of the headless bolt 46therein. These tapped openings 50, 52, and 54, are provided tointerchangeably receive measuring posts (not shown) of varying lengthsto correspondingly vary the measuring range of the gauge, as is wellunderstood by those skilled in general machine shop practices.

In the use of the gauge, as it is thus constituted, the gauge head 26 isto be quickly moved relatively to the triangular frame Hi to a roughlyapproximated setting thereon, upon the loosening up of the clamp plates20 and 38, and a spring washer 38 bearing on the clamp plate 38, by aproper manipulation of the clamp screw 32 from the knurled head 34 andthe look nut 36. The gauge head 26 will be secured in this approximatedposition, sufficiently to prevent accidental displacement during'furtherhandling, by the down tuming of the clamp screw 32 which, when its lowerend contacts the bottom of the groove l8, forces the clamp plate 20upwardly against the upper walls of the cross-slot of the latter. Whenthus positioned and lightly secured, the gauge head 26 will be slowlyand accurately adjusted to its final setting by a proper manipulation ofthe knurled nut 42 on the bolt 46. Here, the gauge head 26 will berigidly secured by a tightening of the lock nut 36 downwardly againstthe spring 2 2,397,492 said T-slot and said side opening, a clamp platewasher 38 and the clamp plate 38, in which movement of the lock nut thespring washer is placed under a tension which acts to exert'a lift onthe clamp screw 32, forcing the clamp plate 20 into a more secureclamping engagement with the upper walls of the cross-slot of the groove18.

Having thus fully described my invention, it is to be understood thatany and all changes in the construction and arrangement of parts, towhich the disclosed embodiment thereof is susceptible,

may be resorted to, without departing from the spirit of the inventionor its scope as claimed.

What I claim is: I i l. A machinists gauge, including a triangular framehaving base surfaces at right angles to each other and a hypothenusesurface provided with a T-slot coextensive therewith, agauge headslidably mounted on said hypothenuse surface.

carried by said clamp screw within said T-slot,

a second clamp plate positioned within said side 7 opening and engagedon said clamp screw, a spring washer engaged on said clamp screw andbearing on said second clamp plate, a bolt carried by said gauge headand projecting into said side opening in right angular relation to saidclamp screw, a knurled; nut carriedv by said bolt and engaged with saidsecondcla'mp plate to impart precision adjustment to' said gauge head,and a lock nut carried on said clamp screw'and adapted to be tightenedagainst said spring washer to seflc'ure the gauge head in adjustedposition between said clamp plates.

2. The invention as in claim 1, with said second clamp plate providedwith an upturned end portion which is engaged in an annular grooveformed in the said knurled nut.

; KONING.

